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Production of Ultra-Fine Grains and Evolution of Grain Boundaries During Severe Plastic Deformation of Aluminum and Its Alloys

2000-12-01
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Release : 2000-12-01
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Book Rating : 187/5 ( reviews)

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Book Synopsis Production of Ultra-Fine Grains and Evolution of Grain Boundaries During Severe Plastic Deformation of Aluminum and Its Alloys by : Douglas L. Swisher

Download or read book Production of Ultra-Fine Grains and Evolution of Grain Boundaries During Severe Plastic Deformation of Aluminum and Its Alloys written by Douglas L. Swisher. This book was released on 2000-12-01. Available in PDF, EPUB and Kindle. Book excerpt: Equal channel-angular pressing (ECAP) is a recently developed method for deformation processing of material that can produce an ultra-fine grain structure in bulk material through severe plastic deformation. This study will present results on micro structural evolution during repetitive ECAP of pure aluminum. The principal method of data collection was Orientation Imaging Microscopy (OIM). The results of the study indicate that, after one ECAP pass, the structure is inhomogeneous and anisotropic, and consists mostly of deformation-induced features. After repetitive ECAP, the aluminum material exhibited a homogeneous grain size but retained an anisotropic character to the microstructure. After twelve ECAP passes the microstructure consisted mainly of fine grains surrounded by high-angle boundaries but an appreciable fraction of low-angle boundaries remained. This microstructure thus comprises a mixture of deformation-induced and recrystallization features. Further results were also obtained documenting the existence of deformation banding in this material as well as in a rolled aluminum alloy. This phenomenon may be general in nature and associated with severe plastic deformation in aluminum and its alloys.

Severe Plastic Deformation

2006 Science
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Release : 2006
Genre : Science
Kind : eBook
Book Rating : 085/5 ( reviews)

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Book Synopsis Severe Plastic Deformation by : Burhanettin Altan

Download or read book Severe Plastic Deformation written by Burhanettin Altan. This book was released on 2006. Available in PDF, EPUB and Kindle. Book excerpt: It has been already well established that the nanostructured materials (materials with a grain size of 100mm or less) is the future materials. Nanostructured materials possess properties superior to those of conventional, coarse grained materials. Hence designing potentially cost efficient and environmentally friendly products with better performance is a possibility. Among others, nanostructured materials exhibit increased strength, hardness and ductility and provide an opportunity for superplastic forming. When all the procedures in use for the production of nanostructured materials are examined, only severe plastic deformation (SPD) processes exhibit a potential for producing relatively large samples suitable for industrial applications. In this monograph, the state-of-the-art on severe plastic deformation methods is presented in one volume. The monograph is organised into eight chapters, each of which contains papers on different aspect of severe plastic deformation methods prepared by the experts in this field. The topics covered in the monograph are structure formation, phase transformation, superplasticity, mechanical properties of nanostructured materials, electronic and magnetic properties of nanostructured materials, deformation analysis, novel SPD methods, commercialisation of ECAE method.

Ultrafine Grained Materials II

2013-09-25 Technology & Engineering
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Release : 2013-09-25
Genre : Technology & Engineering
Kind : eBook
Book Rating : 481/5 ( reviews)

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Book Synopsis Ultrafine Grained Materials II by : Yuntian Theodore Zhu

Download or read book Ultrafine Grained Materials II written by Yuntian Theodore Zhu. This book was released on 2013-09-25. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium sponsored by the Shaping and Forming Committee of the Materials Processing and Manufacturing Division (MPMD) and the Mechanical Behavior Committee (Jt. SMD/ASM-MSCTS) of the Structural Materials Division (SMD) of TMS (The Minerals, Metals & Materials Society) and held during the 2002 TMS Annual Meeting in Seattle, Washington February 17-21,2002.

Severe Plastic Deformation

2018-07-14 Technology & Engineering
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Release : 2018-07-14
Genre : Technology & Engineering
Kind : eBook
Book Rating : 670/5 ( reviews)

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Book Synopsis Severe Plastic Deformation by : Ghader Faraji

Download or read book Severe Plastic Deformation written by Ghader Faraji. This book was released on 2018-07-14. Available in PDF, EPUB and Kindle. Book excerpt: Severe Plastic Deformation: Methods, Processing and Properties examines all severe plastic deformation techniques developed over the past two decades, exploring the appropriate severe plastic deformation method for a particular case. The book offers an overview of these methods, introduces ultrafine-grained and nano-grained metals and methods for various bulk, sheet, tubular and large size samples, reviews effective parameters to make a severe plastic deformation method better, from property (mechanical) and processing (cost, time, load, etc.) viewpoints, discusses mechanical, physical and chemical properties of UFG and NS metals, and concludes with various applications for these methods. Over the last several decades, a large number of severe plastic deformation methods have been developed for processing a wide array of metals for superior properties, making this a timely resource. Collects all severe plastic deformation methods in a unique reference Compares severe plastic deformation methods from several viewpoints, including processing and final property Classifies severe plastic deformation methods based on the sample shape and mechanics, as well as the properties achieved in the processed metal Introduces ultrafine-grained and nano-grained metals and methods for various bulk, sheet, tubular and large size samples

Severe Plastic Deformation Techniques

2017-08-09 Science
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Release : 2017-08-09
Genre : Science
Kind : eBook
Book Rating : 256/5 ( reviews)

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Book Synopsis Severe Plastic Deformation Techniques by : Marcello Cabibbo

Download or read book Severe Plastic Deformation Techniques written by Marcello Cabibbo. This book was released on 2017-08-09. Available in PDF, EPUB and Kindle. Book excerpt: Grain size is recognized as a key microstructural factor affecting mechanical and, to some extent, physical properties of metals and metallic materials. For this reason, all the means designed to control and modify the grain size are considered a proper way to design and tailor metallic materials with desired properties. In this sense, microstructure refinement through severe plastic deformation (SPD) techniques can be considered a key method for this purpose. A typical SPD process is currently defined as any method of metal forming under extensive hydrostatic pressure intended to impose a very high strain on a bulk solid without involving any significant change in the overall dimensions and having the ability to produce exceptional grain refinement. What makes SPD processing techniques so popular and attractive is the possibility of using them to enhance the strength behavior of conventional metallic materials by a factor of up to eight for pure metals such as copper and by some 30-50% for alloys. Despite the impressive property improvement achievable with SPD techniques, their uptake by industry has been rather sluggish. This book intends to give a panorama of the typical SPD techniques intended to optimize the mechanical and physical properties of metals through a significant grain size reduction process. Modeling for this purpose is also presented.

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